The couple, who began dating in 2007 and welcomed baby girl Lincoln in March, have been very vocal regarding their commitment to marriage equality.

In a February 2012 interview with The Advocate, Kristen explained their decision to hold off on tying the knot.

"The reason we're not rushing to get married is because I don't feel appropriate taking advantage of a right that's denied to my [gay and lesbian] friends," she told the mag at the time. "That's why we've been so hesitant. Dax and I have talked about it a lot, and this issue is very important to both of us. We're just standing up for what we believe in. Period."